UNSTABLE PARTICLES IN FINITE VOLUME - THE BROKEN PHASE OF THE 4-D O(4) NONLINEAR SIGMA-MODEL

被引：8

作者：

ZIMMERMANN, F

WESTPHALEN, J

GOCKELER, M

KASTRUP, HA

机构：

[1] RHEIN WESTFAL TH AACHEN, INST THEORET PHYS E, W-5100 AACHEN, GERMANY

[2] FORSCHUNGSZENTRUM JULICH, HLRZ, W-5170 JULICH 1, GERMANY

来源：

NUCLEAR PHYSICS B | 1993年

关键词：

D O I：

10.1016/0920-5632(93)90347-9

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

According to a proposal of Luscher it is possible to determine elastic scattering phases in infinite volume from the energy spectrum of two-particle states in a periodic box. We demonstrate the applicability of this method in the broken phase of the 4-dimensional O(4) non-linear sigma-model in a Monte-Carlo study on finite lattices. This non-perturbative approach also permits the study of unstable particles, the sigma-particle in our case. We observe the sigma-resonance and extract its mass and its width.

引用

页码：879 / 882

页数：4

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